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plot_period_transactions with low "s" parameter

See original GitHub issue

Hello, I have problem with plot_period_transactions for estimated Pareto/NBD parameters. Parameters:

OrderedDict([('r', 1.2264068998969124),
             ('alpha', 12.16294151917949),
             ('s', 4.6377925306795664e-10),
             ('beta', 32.52434379061591)])

I get this error message:

C:\ProgramData\Anaconda3\lib\site-packages\lifetimes\ RuntimeWarning: divide by zero encountered in double_scalars
  time_of_death = stats.expon.rvs(scale=1. / mu)

I think this issue comes with “s” parameter, which is extreamly low. Could you confirm it? Is it bug or I do something wrong?

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

albrzykowskicommented, Jul 26, 2019

Hi, @CamDavidsonPilon Do you have any conclusions why CLV is wrongly calculated for this dataset. Have you made any statistics that can explain the low value of s?

Kind regards, Leszek

CamDavidsonPiloncommented, Sep 20, 2018

the s parameter controls how fast people die, so I would do some summary statistics on your training data. Perhaps there is something wrong there.

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